WS-2026-0032
Published:August 28, 2026
Updated:August 31, 2026
The NumpyReader class in monai/data/image_reader.py unconditionally calls np.load(name, allow_pickle=True), enabling arbitrary code execution when loading a crafted .npy or .npz file. The allow_pickle parameter was hardcoded to True and could not be overridden by the caller, and NumpyReader is selected automatically by the LoadImage transform for any .npy or .npz file. Fixed in 1.6.0, which exposes allow_pickle as a parameter defaulting to False.
Affected Packages
monai (CONDA):
Affected version(s) >=0.8.0 <1.6.0Fix Suggestion:
Update to version 1.6.0https://github.com/Project-MONAI/MONAI.git (GITHUB):
Affected version(s) >=1.0.0 <1.6.0Fix Suggestion:
Update to version 1.6.0monai (PYTHON):
Affected version(s) >=0.0.1 <1.6.0Fix Suggestion:
Update to version 1.6.0Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Deserialization of Untrusted Data